\begin{table}[htbp!] \centering \begin{threeparttable}                                 \begin{tabular} {l c c} \toprule                                 \caption{BIT recommendations for trial adoption}                                 Dep. Var.: & BIT recommended adopt & Trial adopted \\                                 \cmidrule(lr){2-2} \cmidrule(lr){3-3}                                 
(OLS)               &         (1)&         (2)\\
\hline
Max $ t\geq1.96$    &        0.71&            \\
                    &      (0.12)&            \\
Max treatment effect (10pp.)&        0.05&            \\
                    &      (0.06)&            \\
BIT recommended for adoption&            &        0.25\\
                    &            &      (0.17)\\
BIT did not recommend for adoption&            &       -0.16\\
                    &            &      (0.11)\\
Communication pre-existed&            &        0.45\\
                    &            &      (0.14)\\
Constant            &        0.25&        0.13\\
                    &      (0.10)&      (0.05)\\
\hline
Average recommendation rate&        0.46&        0.18\\
Trials with recommendations only&$\checkmark$&            \\
Number of trials    &          28&          73\\
Number of cities    &          16&          30\\
$ R^2$              &        0.46&        0.38\\
\bottomrule \end{tabular} \label{tab:recommendations}                         \begin{tablenotes} \footnotesize                         \item Standard errors clustered by city are shown in parentheses.                                 BIT has included recommendations for or against adoption in their trial reports since mid-2017.                                 In Column 2, the omitted group are the earlier trials without BIT recommendations in the trial reports.                         \end{tablenotes} \end{threeparttable} \end{table}
